R&D PROJECT // STEALTH ENCRYPTED MESSAGING

E2E encrypted messaging,
hidden in plain sight.

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Okrat is a covert messaging app disguised as a standard calculator. Every conversation is end-to-end encrypted using the Signal protocol (X3DH + Double Ratchet) — ensuring zero-knowledge, zero-trust communication on hardened devices.

Encryption

E2E · Signal Protocol

Target Platform

GrapheneOS · Pixel 9

Try the live prototype: enter any number and press = to unlock the hidden messenger.